MAKING MATH AND SCIENCE FUN - Cadets from the U.S. Military Academy at West Point, N.Y., talk with youngsters last Saturday before a robotics competition gets underway at the Calhoun Family Investment Center in Gilpin Court. About 40 middle school students from the Richmond Redevelopment and Housing Authority’s housing communities participated in numerous hands-on activities in S.T.E.M. areas — science, technology, engineering and math